What are some different types of inflammatory arthritis?

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Rheumatoid arthritis and gout are the most common types of inflammatory arthritis, according to WebMD. Unlike osteoarthritis, which is a degenerative condition, inflammatory arthritis affects the tissues that surround the joints. Other types of inflammatory arthritis include psoriatic arthritis, lupus and septic arthritis.

Rheumatoid arthritis is an autoimmune disease primarily affecting the joints, reports WebMD. Researchers have not yet identified the specific protein responsible for this condition. Chronic inflammation caused by rheumatoid arthritis frequently results in joint damage and deformity, and many sufferers develop lumps called rheumatoid nodules on joints such as knuckles and elbows where areas of the joint are subject to pressure. In addition to joint pain and stiffness, symptoms of rheumatoid arthritis are often severe and can include fatigue, fever, loss of appetite and weight loss.

Gout is an inflammatory condition caused by urate crystals accumulating in joint tissues, explains Mayo Clinic. Uric acid is normally dissolved in the blood, filtered out by the kidneys and excreted in urine. When produced in excessive amounts, or when not sufficiently excreted by the kidneys, uric acid builds up and forms needle-like crystals in the toes, feet, ankles, wrists and hands. Gout symptoms are usually sudden with severe pain and swelling that gradually subside. Ensuing attacks generally last longer and spread to other joints, eventually resulting in diminished joint mobility.